Motor-driven surgical cutting instrument

  • US 10,898,184 B2
  • Filed: 09/28/2018
  • Issued: 01/26/2021
  • Est. Priority Date: 09/23/2008
  • Status: Active Grant
First Claim
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1. A surgical instrument, comprising:

  • an end effector configured to clamp tissue, wherein said end effector comprises a moveable member comprising a cutting element that, when actuated, longitudinally traverses said end effector along a cutting travel path to cut tissue clamped in said end effector, wherein said cutting travel path has an initial position and an end-of-stroke position;

    an electric motor that drives said moveable member of said end effector toward said end-of-stroke position when said electric motor is forward rotated, wherein said electric motor retracts said moveable member of said end effector away from said end-of-stroke position when said electric motor is reverse rotated, and wherein said electric motor is configured to actuate said cutting element of said end effector; and

    a motor control circuit connected to said electric motor, wherein said motor control circuit is configured to adjustably control said electric motor to thereby adjustably control movement of said moveable member of said end effector during reverse rotation of said electric motor, and wherein said motor control circuit comprises;

    a power source connected to said electric motor for electrically powering said electric motor; and

    a current control circuit connected to said power source for varying the current supplied to said electric motor from said power source, wherein said current control circuit controls said electric motor according to a switching architecture when said electric motor is reverse rotated, and wherein the switching architecture comprises;

    a first, low power operational mode, wherein said first, low power operational mode is pre-set by said motor control circuit; and

    a second, high power operational mode, wherein said second, high power operational mode is pre-set by said motor control circuit, and wherein greater current is supplied to said electric motor during said second, high power operational mode than during said first, low power operational mode.

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